+static struct crypto_alg *crypto_user_skcipher_alg(const char *name, u32 type,
+ u32 mask)
+{
+ int err;
+ struct crypto_alg *alg;
+
+ type = crypto_skcipher_type(type);
+ mask = crypto_skcipher_mask(mask);
+
+ for (;;) {
+ alg = crypto_lookup_skcipher(name, type, mask);
+ if (!IS_ERR(alg))
+ return alg;
+
+ err = PTR_ERR(alg);
+ if (err != -EAGAIN)
+ break;
+ if (signal_pending(current)) {
+ err = -EINTR;
+ break;
+ }
+ }
+
+ return ERR_PTR(err);
+}
+
+static struct crypto_alg *crypto_user_aead_alg(const char *name, u32 type,
+ u32 mask)
+{
+ int err;
+ struct crypto_alg *alg;
+
+ type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
+ type |= CRYPTO_ALG_TYPE_AEAD;
+ mask &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
+ mask |= CRYPTO_ALG_TYPE_MASK;
+
+ for (;;) {
+ alg = crypto_lookup_aead(name, type, mask);
+ if (!IS_ERR(alg))
+ return alg;
+
+ err = PTR_ERR(alg);
+ if (err != -EAGAIN)
+ break;
+ if (signal_pending(current)) {
+ err = -EINTR;
+ break;
+ }
+ }
+
+ return ERR_PTR(err);
+}
+